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Pioneer Venus Orbiter

(PVO, Pioneer 12, Pioneer Venus 1)
(NASA Venus probe launched 1978)

Pioneer Venus Orbiter (PVO, Pioneer 12, or Pioneer Venus 1) was a space probe launched in 1978 for Venus, operational until 1992 when it ran out of propellant and eventually was burned in Venus's atmosphere. In 1986, the PVO observed Comet Halley. Instruments:


(spacecraft,Venus,NASA)
Further reading:
http://en.wikipedia.org/wiki/Pioneer_Venus_Orbiter
https://www.nasa.gov/centers/ames/missions/archive/pioneer-venus.html
https://nssdc.gsfc.nasa.gov/planetary/pioneer_venus.html
https://heasarc.gsfc.nasa.gov/docs/heasarc/missions/pvo.html

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